diff --git a/compose.yml b/compose.yml
index f0abeec..4a508fb 100644
--- a/compose.yml
+++ b/compose.yml
@@ -1,12 +1,12 @@
 services:
   gemini:
-    image: git.joeac.net/joeac/joeac.net-gemini
+    image: git.joeac.net/joeac/${CONTAINER_PREFIX}joeac.net-gemini
     container_name: joeac.net-gemini
     build:
       context: .
       dockerfile: gemini.Dockerfile
     ports:
-      - "1965:1965"
+      - "${GEMINI_PORT}:1965"
 
   http:
     image: git.joeac.net/joeac/joeac.net-http
@@ -14,10 +14,20 @@ services:
     build:
       context: .
       dockerfile: http.Dockerfile
-    env_file:
-      - .env
+    environment:
+      MAX_DAILY_EMAILS: ${MAX_DAILY_EMAILS}
+      CONTACT_MAILBOX: ${CONTACT_MAILBOX}
+      CONTACT_MAILBOX_NAME: ${CONTACT_MAILBOX_NAME}
+      LOCAL_SMTP_FROM: ${LOCAL_SMTP_FROM}
+      LOCAL_SMTP_FROM_NAME: ${LOCAL_SMTP_FROM_NAME}
+      LOCAL_SMTP_HOST: ${LOCAL_SMTP_HOST}
+      LOCAL_SMTP_PORT: ${LOCAL_SMTP_PORT}
+      LOCAL_SMTP_USER: ${LOCAL_SMTP_USER}
+      LOCAL_SMTP_PASSWORD: ${LOCAL_SMTP_PASSWORD}
+      DB_SCHEME: ${DB_SCHEME}
+      DB_PATH: ${DB_PATH}
     ports:
-      - "8080:80"
+      - "${HTTP_PORT}:80"
 
   etherpad:
     image: git.joeac.net/joeac/joeac.net-etherpad
@@ -44,13 +54,15 @@ services:
       context: .
       dockerfile: smtp.Dockerfile
       args:
-        SMTP_PORT: 2500
-    env_file:
-      - .env
+        SMTP_PORT: ${LOCAL_SMTP_PORT}
     environment:
-      SMTP_PORT: 2500
-      SMTP_USER: smtp
-      SMTP_PASSWORD: smtp
+      LOCAL_SMTP_ENVELOPE_FROM: ${LOCAL_SMTP_ENVELOPE_FROM}
+      REMOTE_SMTP_HOST: ${REMOTE_SMTP_HOST}
+      REMOTE_SMTP_PORT: ${REMOTE_SMTP_PORT}
+      REMOTE_SMTP_USER: ${REMOTE_SMTP_USER}
+      SMTP_PORT: ${LOCAL_SMTP_PORT}
+      SMTP_USER: ${LOCAL_SMTP_USER}
+      SMTP_PASSWORD: ${LOCAL_SMTP_PASSWORD}
       REMOTE_SMTP_PASSWORD_FILE: /run/secrets/remote_smtp_password
     secrets:
       - remote_smtp_password
@@ -64,7 +76,7 @@ services:
     volumes:
       - ./vaultwarden/vw-data/:/data/
     ports:
-      - "9000:80"
+      - "${VAULTWARDEN_PORT}:80"
 
 secrets:
   remote_smtp_password:
diff --git a/example.env b/example.env
index 78131f5..8ed6bc7 100644
--- a/example.env
+++ b/example.env
@@ -1,3 +1,7 @@
+# A prefix for remote container names
+# If you're running on ARM 32-bit CPU architecture, use 'armv7/', otherwise keep blank
+CONTAINER_PREFIX=
+
 # The hostname to use for the local SMTP server
 LOCAL_SMTP_HOST=
 
@@ -48,3 +52,15 @@ DB_SCHEME=
 
 # The path part of the URI to the website database
 DB_PATH=
+
+# The Node.JS environment for the Etherpad instance (production, development)
+ETHERPAD_NODE_ENV=production
+
+# The admin password for the Etherpad instance
+ETHERPAD_ADMIN_PASSWORD=
+
+# The ports on which to run apps
+ETHERPAD_PORT=9001
+HTTP_PORT=8080
+GEMINI_PORT=1965
+VAULTWARDEN_PORT=9000