chore: pin docker images (#1142)

Pin the base alpine image and use the ghcr image in verification,
pinned to the version deployed by the Docker workflow.

Author: steabert

.github/workflows/verify.yml

@@ -36,7 +36,7 @@ jobs:
     runs-on: ubuntu-latest
     services:
       gstreamer:
-        image: steabert/gst-rtsp-launch@sha256:24b369baa83375a1b97a7596aabbda8d1915823920049d669fa4a5035c05dbc1
+        image: ghcr.io/axiscommunications/media-stream-library-js/gst-rtsp-launch@sha256:3ab088f2b79b0134647b1438f682f8ad0cbd9a65540ed1e8210b3264480a4014
         ports:
           - 8554:8554
     steps:
@@ -66,7 +66,7 @@ jobs:
     runs-on: ubuntu-latest
     services:
       gstreamer:
-        image: steabert/gst-rtsp-launch@sha256:24b369baa83375a1b97a7596aabbda8d1915823920049d669fa4a5035c05dbc1
+        image: ghcr.io/axiscommunications/media-stream-library-js/gst-rtsp-launch@sha256:3ab088f2b79b0134647b1438f682f8ad0cbd9a65540ed1e8210b3264480a4014
         ports:
           - 8554:8554
     steps:
@@ -88,7 +88,7 @@ jobs:
     runs-on: ubuntu-latest
     services:
       gstreamer:
-        image: steabert/gst-rtsp-launch@sha256:24b369baa83375a1b97a7596aabbda8d1915823920049d669fa4a5035c05dbc1
+        image: ghcr.io/axiscommunications/media-stream-library-js/gst-rtsp-launch@sha256:3ab088f2b79b0134647b1438f682f8ad0cbd9a65540ed1e8210b3264480a4014
         ports:
           - 8554:8554
     steps:

gst-rtsp-launch/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:edge AS build
+FROM alpine:edge@sha256:115729ec5cb049ba6359c3ab005ac742012d92bbaa5b8bc1a878f1e8f62c0cb8 AS build
 RUN echo http://nl.alpinelinux.org/alpine/edge/testing >> /etc/apk/repositories
 RUN apk add --no-cache gst-rtsp-server-dev
 RUN apk add --no-cache libtool
@@ -10,7 +10,7 @@ RUN libtool --mode=link \
  -L/usr/lib/x86_64-linux-gnu -lgstrtspserver-1.0 \
  -o gst-rtsp-launch gst-rtsp-launch.c
 
-FROM alpine:edge
+FROM alpine:edge@sha256:115729ec5cb049ba6359c3ab005ac742012d92bbaa5b8bc1a878f1e8f62c0cb8
 RUN echo http://nl.alpinelinux.org/alpine/edge/testing >> /etc/apk/repositories
 RUN apk add --no-cache gst-rtsp-server
 RUN apk add --no-cache gst-plugins-base

scripts/rtsp-server.sh

@@ -23,19 +23,20 @@ h264_pipeline="videotestsrc ! video/x-raw,width=1920,height=1080 ! timeoverlay t
 h264_port="8554"
 mjpeg_pipeline="videotestsrc pattern=ball ! video/x-raw,width=1280,height=720,format=YUY2 ! timeoverlay text='MJPEG' valignment=top halignment=left ! jpegenc ! rtpjpegpay name=pay0 pt=96"
 mjpeg_port="8555"
+docker_image="ghcr.io/axiscommunications/media-stream-library-js/gst-rtsp-launch@sha256:3ab088f2b79b0134647b1438f682f8ad0cbd9a65540ed1e8210b3264480a4014"
 
 if [ -z "$1" ]; then
   echo "serving H.264 video on rtsp://0.0.0.0:${h264_port}/test"
-  h264_container=$(docker run -d --rm -p ${h264_port}:8554 steabert/gst-rtsp-launch "$h264_pipeline")
+  h264_container=$(docker run -d --rm -p ${h264_port}:8554 $docker_image "$h264_pipeline")
   echo "serving Motion JPEG video on rtsp://0.0.0.0:${mjpeg_port}/test"
-  mjpeg_container=$(docker run -d --rm -p ${mjpeg_port}:8554 steabert/gst-rtsp-launch "$mjpeg_pipeline")
+  mjpeg_container=$(docker run -d --rm -p ${mjpeg_port}:8554 $docker_image "$mjpeg_pipeline")
   container="${h264_container} ${mjpeg_container}"
 elif [ "$1" = "docker" ]; then
   echo "using default pipeline configured inside the docker container (port 8554)"
-  container=$(docker run -d --rm -p 8554:8554 steabert/gst-rtsp-launch)
+  container=$(docker run -d --rm -p 8554:8554 $docker_image)
 else
   echo "using user-specified launch pipeline: $1 (port 8554)"
-  container=$(docker run -d --rm -p 8554:8554 steabert/gst-rtsp-launch "$1")
+  container=$(docker run -d --rm -p 8554:8554 $docker_image "$1")
 fi
 
 if [ -z "${container}" ]; then