refactor: new dev/prod containers

- Use a single Dockerfile for all Zeppelin services
- Add a Dockerfile in project root that can be used by
  app hosting services
- Provide a standalone and lightweight prod setup
  - Standalone is the same as the old setup, with mysql+nginx
  - Lightweight only runs bot+backend+dash, no mysql/nginx
- Remove mounted mysql data folders for dev and prod
  - This resolves permission issues caused by the mount
  - The mysql service uses a regular named volume now
- Simplify .env options and clearly separate different prod setups
- Remove update.sh
  - Different setups require different update procedures, so a common
    update.sh no longer works

.env.example

@@ -1,3 +1,7 @@
+# ==========================
+# GENERAL OPTIONS
+# ==========================
+
 # 32 character encryption key
 KEY=
 
@@ -17,58 +21,63 @@ STAFF=
 # A comma-separated list of server IDs that should be allowed by default
 DEFAULT_ALLOWED_SERVERS=
 
-# When using the Docker-based development environment, this is only used internally. The API will be available at localhost:DOCKER_DEV_WEB_PORT/api.
-API_PORT=3000
-
 # Only required if relevant feature is used
 #PHISHERMAN_API_KEY=
 
-# The user ID and group ID that should be used within the Docker containers
-# This should match your own user ID and group ID. Run `id -u` and `id -g` to find them.
-DOCKER_USER_UID=
-DOCKER_USER_GID=
 
-#
-# DOCKER (DEVELOPMENT)
-# NOTE: You only need to fill in these values for running the development environment. See production config further below.
-#
+# ==========================
+# DEVELOPMENT
+# NOTE: You only need to fill in these values for running the development environment
+# ==========================
 
-DOCKER_DEV_WEB_PORT=3300
+DEVELOPMENT_WEB_PORT=3300
 
 # The MySQL database running in the container is exposed to the host on this port,
 # allowing access with database tools such as DBeaver
-DOCKER_DEV_MYSQL_PORT=3001
+DEVELOPMENT_MYSQL_PORT=3356
 # Password for the Zeppelin database user
-DOCKER_DEV_MYSQL_PASSWORD=
+DEVELOPMENT_MYSQL_PASSWORD=password
 # Password for the MySQL root user
-DOCKER_DEV_MYSQL_ROOT_PASSWORD=
+DEVELOPMENT_MYSQL_ROOT_PASSWORD=password
 
 # The development environment container has an SSH server that you can connect to.
 # This is the port that server is exposed to the host on.
-DOCKER_DEV_SSH_PORT=3002
-DOCKER_DEV_SSH_PASSWORD=password
+DEVELOPMENT_SSH_PORT=3022
+DEVELOPMENT_SSH_PASSWORD=password
 
 # If your user has a different UID than 1000, you might have to fill that in here to avoid permission issues
-#DOCKER_DEV_UID=1000
+#DEVELOPMENT_UID=1000
 
-#
-# DOCKER (PRODUCTION)
-# NOTE: You only need to fill in these values for running the production environment. See development config above.
-#
 
-DOCKER_PROD_DOMAIN=
-DOCKER_PROD_WEB_PORT=443
+# ==========================
+# PRODUCTION - STANDALONE
+# NOTE: You only need to fill in these values for running the standalone production environment
+# ==========================
+
+STANDALONE_DOMAIN=
+
+STANDALONE_WEB_PORT=443
+
 # The MySQL database running in the container is exposed to the host on this port,
 # allowing access with database tools such as DBeaver
-DOCKER_PROD_MYSQL_PORT=3001
+STANDALONE_MYSQL_PORT=3356
 # Password for the Zeppelin database user
-DOCKER_PROD_MYSQL_PASSWORD=
+STANDALONE_MYSQL_PASSWORD=
 # Password for the MySQL root user
-DOCKER_PROD_MYSQL_ROOT_PASSWORD=
+STANDALONE_MYSQL_ROOT_PASSWORD=
 
-# You only need to set these if you're running an external database.
-# In a standard setup, the database is run in a docker container.
-#DB_HOST=
-#DB_USER=
-#DB_PASSWORD=
-#DB_DATABASE=
+
+# ==========================
+# PRODUCTION - LIGHTWEIGHT
+# NOTE: You only need to fill in these values for running the lightweight production environment
+# ==========================
+
+# Ports where the API/dashboard are exposed on the host
+LIGHTWEIGHT_API_PORT=3001
+LIGHTWEIGHT_DASHBOARD_PORT=3002
+
+LIGHTWEIGHT_DB_HOST=
+LIGHTWEIGHT_DB_PORT=
+LIGHTWEIGHT_DB_USER=
+LIGHTWEIGHT_DB_PASSWORD=
+LIGHTWEIGHT_DB_DATABASE=