Include a devcontainer.json

Author: hectorcorrea

.gitignore

@@ -0,0 +1,2 @@
+# Generated file
+.devcontainer/

Dockerfile

@@ -1,6 +1,5 @@
 FROM ruby:3.0
-WORKDIR /usr/src/app
-# CMD ["./your-daemon-or-script.rb"]
-# ENV PORT 3000
+WORKDIR /root
 EXPOSE 3000
-ENTRYPOINT [ "/bin/bash" ]
+# Keep container running https://devopscube.com/keep-docker-container-running/
+ENTRYPOINT ["tail", "-f", "/dev/null"]

devcontainer.json

@@ -0,0 +1,5 @@
+{
+    "name": "ruby-server-container",
+    "forwardPorts": [3000],
+    "build.dockerfile": "./Dockerfile"
+}

notes.md

@@ -1,20 +1,4 @@
-
-# Ruby official container
-
-https://hub.docker.com/_/ruby
-
-
-Dockerfile
-
-```
-FROM ruby:3.0
-WORKDIR /usr/src/app
-# CMD ["./your-daemon-or-script.rb"]
-# ENV PORT 3000
-# EXPOSE $PORT
-ENTRYPOINT [ "/bin/bash" ]
-```
-
+# Creating a Docker container with Ruby on it
 
 Create the docker image
 ```
@@ -27,46 +11,33 @@ docker create --name ruby-server --publish 3000:3000 ruby-image
 ```
 
 Start the container
-This starts it and exits immediately (!!!)
 ```
-docker start webdev-nutshell
-```
-
-
-Start the container (detached iteractive)
-https://stackoverflow.com/a/31143261/446681
-```
-docker run -dit -p 3000:3000 --name ruby-server ruby-image
-
-
+docker start ruby-server
 ```
 
-
 SSH into the container
 ```
 docker exec -it ruby-server /bin/bash
 ```
 
 
-TODO: Port binding in docker is not working
-See https://stackoverflow.com/questions/54940990/docker-cant-connect-to-container-exposed-port
-
-
-# Docker build
-
-https://docs.docker.com/engine/reference/commandline/build/
-
-```
-docker build - < Dockerfile
-
-```
-
-
 # VS Code Docker Extension
 https://code.visualstudio.com/docs/devcontainers/containers
 https://code.visualstudio.com/docs/devcontainers/tutorial
 https://code.visualstudio.com/docs/devcontainers/create-dev-container
 
+https://containers.dev/implementors/json_reference/
+https://containers.dev/implementors/reference/
+
+# Docker 
+Docker Hub https://hub.docker.com/_/ruby
+Keep container running https://devopscube.com/keep-docker-container-running/
+
+Start the container (detached iteractive) 
+https://stackoverflow.com/a/31143261/446681
+```
+docker run -dit -p 3000:3000 --name ruby-server ruby-image
+```
 
 
 # Misc