1&2 stage worked

Dockerfile

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+FROM nginx:latest
+
+ARG NET_NAME=kek
+ARG CONTAINER_NAME=lol
+ARG STATIC_FILE=/usr/share/nginx/html/index.html
+
+
+RUN sed -i '13,21d' $STATIC_FILE && \
+    sed -i "13i <h2>$NET_NAME<br>$CONTAINER_NAME</h2>" $STATIC_FILE
+

docker-compose.yml

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+version: "3"
+
+services:
+# ----------------------------------------------
+  ngx1-net1:
+    build: 
+      context: .
+      args:
+        NET_NAME: net_1
+        CONTAINER_NAME: container_1
+    ports:
+      - "8080:80"
+    networks:
+      - net_1
+      - net_3
+  ngx2-net1:
+    build: 
+      context: .
+      args:
+        NET_NAME: net_1
+        CONTAINER_NAME: container_2
+    networks:
+      - net_1
+# ----------------------------------------------
+  ngx1-net2:
+    build:
+      context: .
+      args:
+        NET_NAME: net_2
+        CONTAINER_NAME: container_1
+    ports:
+      - "8081:80"
+    networks:
+      - net_2
+      - net_3
+  ngx2-net2:
+    build:
+      context: .
+      args:
+        NET_NAME: net_2
+        CONTAINER_NAME: container_2
+    networks:
+      - net_2
+# ----------------------------------------------
+  visor:
+    image: ubuntu:latest
+    restart: on-failure
+    command: >
+      bash -c "apt update
+      && apt install iproute2 vim curl nmap -y
+      && sleep infinity"
+    networks:
+      - net_3
+
+networks:
+  net_1:
+  net_2:
+  net_3: