Add docker common functions

plugins/docker-common/README.md

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+## Docker common plugin
+
+A set of useful docker commands.
+
+### Dserve
+```bash
+cd /myStaticFolder
+dserve # It will lift an nfginx and output the port used on the host
+# After you used it you can stop and remove it easily by name
+# all the created container names will start with the dserve prefix
+docker dstop dserve-myStaticFolder
+docker rm dserve-myStaticFolder
+```
+
+### Doc
+This run command has many scenarios, this is just a basic configuration.
+```bash
+doc ls -a # It runs the command on a image with zsh inside
+doc "cd .. && ls -a" # It list files from the parent folder inside the container
+```
+
+### Sdoc
+Same as Doc but it mount volumes as read-only.
+```bash
+sdoc ls -a # It runs the command on a image with zsh inside
+```

plugins/docker-common/_docker-common

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+dserve() {
+  local container=dserve${$(pwd)//\//-}
+  (docker restart $container \
+    || docker run -d --name $container -P -v "$(pwd):/usr/share/nginx/html:ro" nginx:stable-alpine) \
+    && docker port $container
+}
+
+doc() {
+  # TODO: add zsh conf
+  # bind shell so we can change current dir (cd, etc)
+  docker run -it --rm -v "$HOME:/root" -v "/:/all" mhoush/zsh zsh -c "cd /all$(pwd) && $*"
+}
+
+sdoc() {
+  docker run -it --rm -v "$HOME:/root" -v "/:/all:ro" mhoush/zsh zsh -c "cd /all$(pwd) && $*"
+}