Apply suggestions from code review

Author: lionello

samples/golang-http-form-railpack/compose.yaml

@@ -10,5 +10,3 @@ services:
       resources:
         reservations:
           memory: 50M
-    healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:8080/"]

samples/nextjs-railpack/compose.yaml

@@ -4,7 +4,6 @@ services:
     # domainname: www.example.xyz # uncomment if you want to use your own domain
     build:
       context: ./app
-      dockerfile: Dockerfile
 
     ports:
       - target: 3000
@@ -14,9 +13,6 @@ services:
     environment:
       PORT: 3000
 
-    healthcheck:
-      test: wget -q --spider http://localhost:3000/ || exit 1
-
     deploy:
       resources:
         reservations:

samples/react-vite-railpack/compose.yaml

@@ -15,5 +15,3 @@ services:
       resources:
         reservations:
           memory: 512M
-    healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:5173/"]