Update docker documentation (#180)

* Update README.md

* Update README.md

* replace NO_EDID=1 with EDID=1

* doc update

.github/workflows/docker-alpine-image.yaml

@@ -59,8 +59,8 @@ jobs:
       -
         name: Test
         run: |
-          echo version: $(docker run --rm -e NO_EDID=1 -t ustreamer --version)
-          echo -e "features:\n$(docker run --rm -e NO_EDID=1 -t ustreamer --features)"
+          echo version: $(docker run --rm -t ustreamer --version)
+          echo -e "features:\n$(docker run --rm -t ustreamer --features)"
       -
         name: Build multi arch
         uses: docker/build-push-action@v3

README.md

@@ -102,11 +102,20 @@ Save changes and reboot.
 ## Launch
 Start container:
 ```bash
-$ docker run --device /dev/video0:/dev/video0 -p 8080:8080 pikvm/ustreamer:latest
+$ docker run --device /dev/video0:/dev/video0 -e EDID=1 -p 8080:8080 pikvm/ustreamer:latest
 ```
 Then access the web interface at port 8080 (e.g. http://raspberrypi.local:8080).
+## Custom config
+```bash
+$ docker run --rm pikvm/ustreamer:latest \
+    --format=uyvy \
+    --workers=3 \
+    --persistent \
+    --dv-timings \
+    --drop-same-frames=30
+```
 ## EDID
-Container will set HDMI EDID before starging ustreamer. Use `-e NO_EDID=1` to not set EDID. Use `-e EDID_HEX=xx` to specify custom EDID data.
+Add `-e EDID=1` to set HDMI EDID before starging ustreamer. Use together with `-e EDID_HEX=xx` to specify custom EDID data.
 
 -----
 # Raspberry Pi Camera Example

pkg/docker/entry.sh

@@ -2,7 +2,7 @@
 
 set -e
 
-[ -z "$NO_EDID" ] && {
+[ -n "$EDID" ] && {
 	[ -n "$EDID_HEX" ] && echo "$EDID_HEX" > /edid.hex
 	while true; do
 		v4l2-ctl --device=/dev/video0 --set-edid=file=/edid.hex --fix-edid-checksums --info-edid && break