Fix Portainer file mounts

README.md

@@ -149,6 +149,11 @@ Expected exposed ports:
 PostgreSQL is intentionally not exposed by default in the Compose file. It is
 only reachable by the backend on the internal Docker network.
 
+The stack builds small local images for `database` and `mqtt` so Portainer does
+not need to bind-mount individual files like `database/init.sql` or
+`mqtt/mosquitto.conf`. This avoids file-versus-directory mount errors in
+Portainer Git stacks.
+
 ### 4. Verify
 
 Open:

database/Dockerfile

@@ -0,0 +1,4 @@
+FROM postgres:16-alpine
+
+COPY init.sql /docker-entrypoint-initdb.d/01-init.sql
+COPY seed.sql /docker-entrypoint-initdb.d/02-seed.sql

docker-compose.yml

@@ -1,14 +1,13 @@
 services:
   database:
-    image: postgres:16-alpine
+    build:
+      context: ./database
     environment:
       POSTGRES_DB: ${POSTGRES_DB:-plasttrack}
       POSTGRES_USER: ${POSTGRES_USER:-plasttrack}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-plasttrack}
     volumes:
       - postgres_data:/var/lib/postgresql/data
-      - ./database/init.sql:/docker-entrypoint-initdb.d/01-init.sql:ro
-      - ./database/seed.sql:/docker-entrypoint-initdb.d/02-seed.sql:ro
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U $${POSTGRES_USER} -d $${POSTGRES_DB}"]
       interval: 5s
@@ -16,12 +15,11 @@ services:
       retries: 20
 
   mqtt:
-    image: eclipse-mosquitto:2
+    build:
+      context: ./mqtt
     ports:
       - "1883:1883"
       - "9001:9001"
-    volumes:
-      - ./mqtt/mosquitto.conf:/mosquitto/config/mosquitto.conf:ro
     healthcheck:
       test: ["CMD-SHELL", "mosquitto_sub -h localhost -p 1883 -t '$$SYS/broker/version' -C 1 -W 3 >/dev/null 2>&1"]
       interval: 10s

mqtt/Dockerfile

@@ -0,0 +1,3 @@
+FROM eclipse-mosquitto:2
+
+COPY mosquitto.conf /mosquitto/config/mosquitto.conf