Mirror of HackMD with some custom changes
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Configuration Using Config file

You can choose to configure CodiMD with either a config file or with environment variables. The config file is processed in lib/config/index.js - so this is the first place to look if anything is missing not obvious from this document. The default values are defined in lib/config/default.js, in case you wonder if you even need to override it.

Environment variables take precedence over configurations from the config files. To get started, it is a good idea to take the config.json.example and copy it to config.json before filling in your own details.


variables example values description
debug true or false set debug mode, show more logs

CodiMD basics

variables example values description
allowPDFExport true Whether or not PDF export is offered.
db { "dialect": "sqlite", "storage": "./db.codimd.sqlite" } set the db configs, see more here
dbURL mysql://localhost:3306/database set the db URL; if set, then db config (below) won't be applied
forbiddenNoteIDs ['robots.txt'] disallow creation of notes, even if allowFreeUrl is true
loglevel info Defines what kind of logs are provided to stdout.
imageUploadType imgur, s3, minio, azure, lutim or filesystem(default) Where to upload images. For S3, see our Image Upload Guides for S3 or Minio
sourceURL https://github.com/codimd/server/tree/<current commit> Provides the link to the source code of CodiMD on the entry page (Please, make sure you change this when you run a modified version)
staticCacheTime 1 * 24 * 60 * 60 * 1000 static file cache time
tooBusyLag 70 CPU time for one eventloop tick until node throttles connections. (milliseconds)
heartbeatInterval 5000 socket.io heartbeat interval
heartbeatTimeout 10000 socket.io heartbeat timeout
documentMaxLength 100000 note max length

CodiMD paths stuff

these are rarely used for various reasons.

variables example values description
defaultNotePath ./public/default.md default note file path1, empty notes will be created with this template.
dhParamPath ./cert/dhparam.pem SSL dhparam path1 (only need when you set useSSL)
sslCAPath ['./cert/COMODORSAAddTrustCA.crt'] SSL ca chain1 (only need when you set useSSL)
sslCertPath ./cert/codimd_io.crt SSL cert path1 (only need when you set useSSL)
sslKeyPath ./cert/client.key SSL key path1 (only need when you set useSSL)
tmpPath ./tmp/ temp directory path1
docsPath ./public/docs docs directory path1
viewPath ./public/views template directory path1
uploadsPath ./public/uploads uploads directory1 - needs to be persistent when you use imageUploadType filesystem

CodiMD Location

variables example values description
domain localhost domain name
urlPath codimd sub URL path, like www.example.com/<urlpath>
host localhost interface/ip to listen on
port 80 port to listen on
path /var/run/codimd.sock path to UNIX domain socket to listen on (if specified, host and port are ignored)
protocolUseSSL true or false set to use SSL protocol for resources path (only applied when domain is set)
useSSL true or false set to use SSL server (if true, will auto turn on protocolUseSSL)
urlAddPort true or false set to add port on callback URL (ports 80 or 443 won't be applied) (only applied when domain is set)
allowOrigin ['localhost'] domain name whitelist


variables example values description
hsts {"enable": true, "maxAgeSeconds": 31536000, "includeSubdomains": true, "preload": true} HSTS options to use with HTTPS (default is the example value, max age is a year)
csp {"enable": true, "directives": {"scriptSrc": "trustworthy-scripts.example.com"}, "upgradeInsecureRequests": "auto", "addDefaults": true} Configures Content Security Policy. Directives are passed to Helmet - see their documentation for more information on the format. Some defaults are added to the configured values so that the application doesn't break. To disable this behaviour, set addDefaults to false. Further, if usecdn is on, some CDN locations are allowed too. By default (auto), insecure (HTTP) requests are upgraded to HTTPS via CSP if useSSL is on. To change this behaviour, set upgradeInsecureRequests to either true or false.

Privacy and External Requests

variables example values description
allowGravatar true or false set to false to disable gravatar as profile picture source on your instance
useCDN true or false set to use CDN resources or not (default is true)

Users and Privileges

variables example values description
allowAnonymous true or false set to allow anonymous usage (default is true)
allowAnonymousEdits true or false if allowAnonymous is true: allow users to select freely permission, allowing guests to edit existing notes (default is false)
allowFreeURL true or false set to allow new note creation by accessing a nonexistent note URL
defaultPermission freely, editable, limited, locked, protected or private set notes default permission (only applied on signed users)
sessionName connect.sid cookie session name
sessionLife 14 * 24 * 60 * 60 * 1000 cookie session life
sessionSecret secret cookie session secret

Login methods

Most of these have never been documented for the config.json, feel free to expand these

Email (local account)

variables example values description
email true or false set to allow email signin
allowEmailRegister true or false set to allow email register (only applied when email is set, default is true. Note bin/manage_users might help you if registration is false.)

Dropbox Login

Facebook Login

GitHub Login

GitLab Login

Google Login

LDAP Login

Mattermost Login

OAuth2 Login

variables example values description
oauth2 {baseURL: ..., userProfileURL: ..., userProfileUsernameAttr: ..., userProfileDisplayNameAttr: ..., userProfileEmailAttr: ..., tokenURL: ..., authorizationURL: ..., clientID: ..., clientSecret: ...} An object detailing your OAuth2 provider. Refer to the Mattermost or Nextcloud examples for more details!

SAML Login

Twitter Login

Upload Storage

Most of these have never been documented for the config.json, feel free to expand these

Amazon S3

variables example values description
s3 { "accessKeyId": "YOUR_S3_ACCESS_KEY_ID", "secretAccessKey": "YOUR_S3_ACCESS_KEY", "region": "YOUR_S3_REGION" } When imageuploadtype be set to s3, you would also need to setup this key, check our S3 Image Upload Guide
s3bucket YOUR_S3_BUCKET_NAME bucket name when imageUploadType is set to s3 or minio

Azure Blob Storage



variables example values description
minio { "accessKey": "YOUR_MINIO_ACCESS_KEY", "secretKey": "YOUR_MINIO_SECRET_KEY", "endpoint": "YOUR_MINIO_HOST", port: 9000, secure: true } When imageUploadType is set to minio, you need to set this key. Also check out our Minio Image Upload Guide


variables example values description
lutim {"url": "YOUR_LUTIM_URL"} When imageUploadType is set to lutim, you can setup the lutim url

1: relative paths are based on CodiMD's base directory