add docker image

Author: dariusstefan

docker/Dockerfile

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+FROM python:3.9-slim-buster
+LABEL maintainer="Darius Stefan <darius.stefan@opensips.org>"
+
+RUN apt-get -y update -qq && \
+    apt-get -y install git
+
+RUN git clone https://github.com/OpenSIPS/python-opensips.git /usr/src/python-opensips && \
+    cd /usr/src/python-opensips && \
+    python3 setup.py install &&\
+    cd / && rm -rf /usr/src/python-opensips
+
+RUN apt-get purge -y git && \
+    apt-get autoremove -y && \
+    apt-get clean
+
+ADD "run.sh" "/run.sh"
+
+ENV PYTHONPATH=/usr/lib/python3/dist-packages
+
+ENTRYPOINT [ "/run.sh" ]

docker/Makefile

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+NAME ?= pyhton-opensips
+OPENSIPS_DOCKER_TAG ?= latest
+
+all: build
+
+.PHONY: build
+build:
+	docker build \
+		--tag="opensips/pyhton-opensips:$(OPENSIPS_DOCKER_TAG)" \
+		.

docker/docker.md

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+# OpenSIPS Python Docker Image
+
+Docker recipe for running a container with pre-installed OpenSIPS Python packages.
+
+## Building the image
+You can build the docker image by running:
+```
+make build
+```
+
+This command will build a docker image with OpenSIPS Python packages installed, along with 
+`opensips-mi` and `opensips-event` command line tools.
+
+## Parameters
+
+The container receives parameters in the following format:
+```
+CMD [PARAMS]*
+```
+
+Meaning of the parameters is as it follows:
+* `CMD` - the command used to run; if the `CMD` ends with `.sh` extension, it
+will be run as a bash script, if the `CMD` ends with `.py` extension, it is
+run as a python script, otherwise it is run as a `opensips-mi` command
+* `PARAMS` - optional additional parameters passed to `CMD`
+
+## Run
+
+To run a bash script, simply pass the connector followed by the bash script:
+```
+docker run --rm opensips/python-opensips:latest script.sh
+```
+
+Similarly, run a python script:
+```
+docker run --rm opensips/python-opensips:latest script.py
+```
+
+To run a single MI command, use:
+```
+docker run --rm opensips/python-opensips:latest -t datagram uptime
+```
+
+## DockerHub
+
+Docker images are available on
+[DockerHub](https://hub.docker.com/r/opensips/python-opensips).

docker/run.sh

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+#!/bin/bash
+
+CMD=$1
+shift
+
+if [[ CMD == *.py ]]; then
+    TOOL=python3
+elif [[ CMD == *.sh ]]; then
+    TOOL=bash
+else
+    TOOL=opensips-mi
+fi
+
+exec $TOOL $CMD "$@"