Added docker-compose plugin

Only function so far: docker-compose-fresh, which shuts down a running
docker-compose instance, deletes the containers, and starts up fresh
instances, then tails the container logs.

Converted this from an alias to a function so that a parameter can be
provided for the name of the docker-compose.yaml file name.

plugins/available/docker-compose.plugin.bash

@@ -0,0 +1,20 @@
+cite about-plugin
+about-plugin 'Helper functions for using docker-compose'
+
+function docker-compose-fresh() {
+  about 'Shut down, remove and start again the docker-compose setup, then tail the logs'
+  group 'docker-compose'
+  param '1: name of the docker-compose.yaml file to use (optional). Default: docker-compose.yaml'
+  example 'docker-compose-fresh docker-compose-foo.yaml'
+
+  local DCO_FILE_PARAM=""
+  if [ -n "$1" ]; then
+    echo "Using docker-compose file: $1"
+    DCO_FILE_PARAM="--file $1"
+  fi
+
+  docker-compose $DCO_FILE_PARAM stop
+  docker-compose $DCO_FILE_PARAM rm -f --all
+  docker-compose $DCO_FILE_PARAM up -d
+  docker-compose $DCO_FILE_PARAM logs -f --tail 100
+}