[feat] add options from mumble-server.ini

Most of the options from mumble-server.ini have been added to .env
No documentation for these settings, since they're described elsewhere.

The exceptions which were not included are:
- *ssl* : adding support for custom certs needs more work
- database, *db*, *sqlite* : as above, for databases
- *ice* : unclear how ZeroC Ice works, decided to skip for now
- logfile, pidfile, *log* : would need to expose these files outside the
  container
- port, host, uname : unneccessary in a container
- legacypasswordhash : unsecure, therefore requires custom compose file
- forceExternalAuth : undocumented

Reference:
on environment variables to set config options in the container: a0ab293b2a/README.md (configuration)
list of options: https://github.com/mumble-voip/mumble/blob/v1.6.870/auxiliary_files/mumble-server.ini

.env.sample

@@ -21,3 +21,59 @@ COMPOSE_FILE="compose.yml"
 
 ## SuperUser Password
 SECRET_SUPERUSER_PASSWORD_VERSION=v1
+
+#################
+# MUMBLE CONFIG #
+#################
+# Documentation for the following options is here:
+# https://github.com/mumble-voip/mumble/blob/v1.6.870/auxiliary_files/mumble-server.ini
+# Note: these options may be untested
+#WELCOME_TEXT=
+#BANDWIDTH=
+#TIMEOUT=
+#USERS=
+#USERS_PER_CHANNEL=
+#MESSAGE_BURST=
+#MESSAGE_LIMIT=
+#PLUGIN_MESSAGE_LIMIT=
+#PLUGIN_MESSAGE_BURST=
+#ALLOW_PING=
+#OPUS_THRESHOLD=
+#CHANNEL_NESTING_LIMIT=
+#CHANNEL_COUNT_LIMIT=
+#CHANNEL_NAME=
+#USERNAME=
+#DEFAULT_CHANNEL=
+#REMEMBER_CHANNEL=
+#REMEMBER_CHANNEL_DURATION=
+#TEXT_MESSAGE_LENGTH=
+#IMAGE_MESSAGE_LENGTH=
+#ALLOW_HTML=
+#LOG_DAYS=
+#REGISTER_NAME=
+#REGISTER_PASSWORD=
+#REGISTER_URL=
+#REGISTER_HOSTNAME=
+#REGISTER_LOCATION=
+#BONJOUR=
+#SSL_CERT=
+#SSL_KEY=
+#SSL_PASSPHRASE=
+#SSL_CA_PEM=
+#SSL_DH_PARAMS=
+#SSL_CIPHERS=
+#OBFUSCATE=
+#CERT_REQUIRED=
+#SEND_VERSION=
+#SUGGEST_VERSION=
+#SUGGEST_POSITIONAL=
+#SUGGEST_PUSH_TO_TALK=
+#KDF_ITERATIONS=
+#AUTOBAN_ATTEMPTS=
+#AUTOBAN_TIMEFRAME=
+#AUTOBAN_TIME=
+#AUTOBAN_SUCCESSFUL_CONNECTIONS=
+#ALLOW_RECORDING=
+#ROLLING_STATS_WINDOW=
+#LISTENERS_PER_CHANNEL=
+#LISTENERS_PER_USER=

compose.yml

@@ -11,6 +11,56 @@ services:
     secrets:
       - source: superuser-pw
         target: MUMBLE_SUPERUSER_PASSWORD
+    environment:
+      MUMBLE_CONFIG_WELCOMETEXT: ${WELCOME_TEXT}
+      MUMBLE_CONFIG_BANDWIDTH: ${BANDWIDTH}
+      MUMBLE_CONFIG_TIMEOUT: ${TIMEOUT}
+      MUMBLE_CONFIG_USERS: ${USERS}
+      MUMBLE_CONFIG_USERSPERCHANNEL: ${USERS_PER_CHANNEL}
+      MUMBLE_CONFIG_MESSAGEBURST: ${MESSAGE_BURST}
+      MUMBLE_CONFIG_MESSAGELIMIT: ${MESSAGE_LIMIT}
+      MUMBLE_CONFIG_PLUGINMESSAGELIMIT: ${PLUGIN_MESSAGE_LIMIT}
+      MUMBLE_CONFIG_PLUGINMESSAGEBURST: ${PLUGIN_MESSAGE_BURST}
+      MUMBLE_CONFIG_ALLOWPING: ${ALLOW_PING}
+      MUMBLE_CONFIG_OPUSTHRESHOLD: ${OPUS_THRESHOLD}
+      MUMBLE_CONFIG_CHANNELNESTINGLIMIT: ${CHANNEL_NESTING_LIMIT}
+      MUMBLE_CONFIG_CHANNELCOUNTLIMIT: ${CHANNEL_COUNT_LIMIT}
+      MUMBLE_CONFIG_CHANNELNAME: ${CHANNEL_NAME}
+      MUMBLE_CONFIG_USERNAME: ${USERNAME}
+      MUMBLE_CONFIG_DEFAULTCHANNEL: ${DEFAULT_CHANNEL}
+      MUMBLE_CONFIG_REMEMBERCHANNEL: ${REMEMBER_CHANNEL}
+      MUMBLE_CONFIG_REMEMBERCHANNELDURATION: ${REMEMBER_CHANNEL_DURATION}
+      MUMBLE_CONFIG_TEXTMESSAGELENGTH: ${TEXT_MESSAGE_LENGTH}
+      MUMBLE_CONFIG_IMAGEMESSAGELENGTH: ${IMAGE_MESSAGE_LENGTH}
+      MUMBLE_CONFIG_ALLOWHTML: ${ALLOW_HTML}
+      MUMBLE_CONFIG_LOGDAYS: ${LOG_DAYS}
+      MUMBLE_CONFIG_REGISTERNAME: ${REGISTER_NAME}
+      MUMBLE_CONFIG_REGISTERPASSWORD: ${REGISTER_PASSWORD}
+      MUMBLE_CONFIG_REGISTERURL: ${REGISTER_URL}
+      MUMBLE_CONFIG_REGISTERHOSTNAME: ${REGISTER_HOSTNAME}
+      MUMBLE_CONFIG_REGISTERLOCATION: ${REGISTER_LOCATION}
+      MUMBLE_CONFIG_BONJOUR: ${BONJOUR}
+      MUMBLE_CONFIG_SSLCERT: ${SSL_CERT}
+      MUMBLE_CONFIG_SSLKEY: ${SSL_KEY}
+      MUMBLE_CONFIG_SSLPASSPHRASE: ${SSL_PASSPHRASE}
+      MUMBLE_CONFIG_SSLCAPEM: ${SSL_CA_PEM}
+      MUMBLE_CONFIG_SSLDHPARAMS: ${SSL_DH_PARAMS}
+      MUMBLE_CONFIG_SSLCIPHERS: ${SSL_CIPHERS}
+      MUMBLE_CONFIG_OBFUSCATE: ${OBFUSCATE}
+      MUMBLE_CONFIG_CERTREQUIRED: ${CERT_REQUIRED}
+      MUMBLE_CONFIG_SENDVERSION: ${SEND_VERSION}
+      MUMBLE_CONFIG_SUGGESTVERSION: ${SUGGEST_VERSION}
+      MUMBLE_CONFIG_SUGGESTPOSITIONAL: ${SUGGEST_POSITIONAL}
+      MUMBLE_CONFIG_SUGGESTPUSHTOTALK: ${SUGGEST_PUSH_TO_TALK}
+      MUMBLE_CONFIG_KDFITERATIONS: ${KDF_ITERATIONS}
+      MUMBLE_CONFIG_AUTOBANATTEMPTS: ${AUTOBAN_ATTEMPTS}
+      MUMBLE_CONFIG_AUTOBANTIMEFRAME: ${AUTOBAN_TIMEFRAME}
+      MUMBLE_CONFIG_AUTOBANTIME: ${AUTOBAN_TIME}
+      MUMBLE_CONFIG_AUTOBANSUCCESSFULCONNECTIONS: ${AUTOBAN_SUCCESSFUL_CONNECTIONS}
+      MUMBLE_CONFIG_ALLOWRECORDING: ${ALLOW_RECORDING}
+      MUMBLE_CONFIG_ROLLINGSTATSWINDOW: ${ROLLING_STATS_WINDOW}
+      MUMBLE_CONFIG_LISTENERSPERCHANNEL: ${LISTENERS_PER_CHANNEL}
+      MUMBLE_CONFIG_LISTENERSPERUSER: ${LISTENERS_PER_USER}
     deploy:
       restart_policy:
         condition: on-failure