add init db script

docker-compose.yml

@@ -20,8 +20,15 @@ services:
     # virtual drive for storage of the db between reboots
     volumes:
       - ./data/db:/data/db
+      - ./init-mongo.js:/docker-entrypoint-initdb.d/init-mongo.js
     networks:
       - todo-network
+    # mongo is being initialized too late so we have to wait for it
+    healthcheck:
+      test: [ "CMD", "mongo", "--eval", "db.adminCommand('ping')" ]
+      interval: 10s
+      timeout: 5s
+      retries: 5
 
   # backend stuff
   backend:
@@ -42,7 +49,8 @@ services:
     ports:
       - "9876:9876"
     depends_on:
-      - mongodb
+      mongodb:
+        condition: service_healthy
 
 # were gonna use this network for both our backend and frontend
 networks:

init-db.js

+db = db.getSiblingDB('admin')
+
+if(db.system.users.find({user: "tododbuser"}).count() === 0){
+    db.createUser({
+        user: "tododbuser",
+        pwd: "tododbadminpassword",
+        roles: [{
+            role: "readWrite", db: "todo"
+        }]
+    })
+}
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