Try to make it github/gitea actionable.

Dockerfile

@@ -17,3 +17,5 @@ RUN mkdir /home/container && chmod 0777 /home/container
 ENV HOME=/home/container
 ENV GOPATH=/home/container/go
 ENV GOCACHE=/home/container/.cache
+
+ENTRYPOINT ["/src/entrypoint.sh"]

action.yml

@@ -0,0 +1,19 @@
+# action.yml
+name: "Go Toolbox"
+description: "A toolbox for golang applications development."
+author: "Stanislav N. aka pztrn"
+inputs:
+  command: # id of input
+    description: "Command to run."
+    required: true
+    default: "task"
+  args:
+    description: "Arguments to pass to command."
+    required: true
+    default: "-l"
+runs:
+  using: "docker"
+  image: "Dockerfile"
+  args:
+    - ${{ inputs.command }}
+    - ${{ inputs.args }}

entrypoint.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+# Entrypoint that handles both GitHub/Gitea actions things and direct commands execution.
+"$@"