diff --git a/docker-compose.yaml b/docker-compose.yaml
index 8b524a9..c2590d6 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -12,7 +12,7 @@ services:
     environment:
       POSTGRES_USER: pleroma
       POSTGRES_DB: pleroma_dev
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_PASSWORD: insecure_password
     volumes:
       - node_a_db:/var/lib/postgresql/data
 
@@ -20,9 +20,10 @@ services:
     build:
       context: .
     environment:
+      POSTGRES_HOST: node_a_db
       POSTGRES_USER: pleroma
       POSTGRES_DB: pleroma_dev
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_PASSWORD: insecure_password
     volumes:
       - pleroma_uploads:/pleroma/uploads
       - ./node_a_config.exs:/pleroma/config/prod.secret.exs
@@ -35,7 +36,7 @@ services:
     environment:
       POSTGRES_USER: pleroma
       POSTGRES_DB: pleroma_dev
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_PASSWORD: insecure_password
     volumes:
       - node_b_db:/var/lib/postgresql/data
 
@@ -43,9 +44,10 @@ services:
     build:
       context: .
     environment:
+      POSTGRES_HOST: node_b_db
       POSTGRES_USER: pleroma
       POSTGRES_DB: pleroma_dev
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_PASSWORD: insecure_password
     volumes:
       - pleroma_uploads:/pleroma/uploads
       - ./node_b_config.exs:/pleroma/config/prod.secret.exs
@@ -58,7 +60,7 @@ services:
     environment:
       POSTGRES_USER: pleroma
       POSTGRES_DB: pleroma_dev
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_PASSWORD: insecure_password
     volumes:
       - node_c_db:/var/lib/postgresql/data
 
@@ -66,9 +68,10 @@ services:
     build:
       context: .
     environment:
+      POSTGRES_HOST: node_c_db
       POSTGRES_USER: pleroma
       POSTGRES_DB: pleroma_dev
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_PASSWORD: insecure_password
     volumes:
       - pleroma_uploads:/pleroma/uploads
       - ./node_b_config.exs:/pleroma/config/prod.secret.exs
diff --git a/node_a_config.exs b/node_a_config.exs
new file mode 100644
index 0000000..8cc6775
--- /dev/null
+++ b/node_a_config.exs
@@ -0,0 +1,8 @@
+use Mix.Config
+
+config :pleroma, Pleroma.Repo,
+    adapter: Ecto.Adapters.Postgres,
+    username: "pleroma",
+    password: "insecure_password",
+    database: "pleroma_dev",
+    hostname: "node_a_db"
diff --git a/node_b_config.exs b/node_b_config.exs
new file mode 100644
index 0000000..6229858
--- /dev/null
+++ b/node_b_config.exs
@@ -0,0 +1,8 @@
+use Mix.Config
+
+config :pleroma, Pleroma.Repo,
+    adapter: Ecto.Adapters.Postgres,
+    username: "pleroma",
+    password: "insecure_password",
+    database: "pleroma_dev",
+    hostname: "node_b_db"
diff --git a/node_c_config.exs b/node_c_config.exs
new file mode 100644
index 0000000..3cb8f13
--- /dev/null
+++ b/node_c_config.exs
@@ -0,0 +1,8 @@
+use Mix.Config
+
+config :pleroma, Pleroma.Repo,
+    adapter: Ecto.Adapters.Postgres,
+    username: "pleroma",
+    password: "insecure_password",
+    database: "pleroma_dev",
+    hostname: "node_c_db"