fixes #8 - add --no-sandbox default chrome flag + possibility to pass CHROME_FLAGS env

Author: jaymoulin

.github/ISSUE_TEMPLATE.md

@@ -18,6 +18,12 @@ If you find this useful, please consider starring the repo and/or donating.
 People showing interest attract more attention ;)
 -->
 
+**Output of `docker inspect lighthouse --format='{{index .Config.Labels.version}}'`:**
+
+```
+(paste your output here)
+```
+
 **Description**
 
 <!--
@@ -46,9 +52,3 @@ Briefly describe the problem you are having in a few paragraphs.
 (paste logs)
 </pre>
 </details>
-
-**Output of `docker inspect lighthouse --format='{{index .Config.Labels.version}}'`:**
-
-```
-(paste your output here)
-```

Dockerfile.amd64

@@ -30,6 +30,8 @@ COPY entrypoint.sh /usr/bin/entrypoint
 # Run Chrome non-privileged
 USER chrome
 
+ENV CHROME_FLAGS="--headless --disable-gpu --no-sandbox"
+
 VOLUME /home/chrome/reports
 
 # Drop to cli

Dockerfile.arm32v7

@@ -35,6 +35,8 @@ COPY entrypoint.sh /usr/bin/entrypoint
 # Run Chrome non-privileged
 USER chrome
 
+ENV CHROME_FLAGS="--headless --disable-gpu --no-sandbox"
+
 VOLUME /home/chrome/reports
 
 # Drop to cli

README.md

@@ -30,6 +30,8 @@ For example, you can export as json with this command:
 docker run --rm --name lighthouse -it -v /path/to/your/report:/home/chrome/reports --cap-add=SYS_ADMIN femtopixel/google-lighthouse http://www.google.com --output json
 ```
 
+You can specify `CHROME_FLAGS` environment variable (`-e` parameter in your docker command) to be used in chrome-flags parameter. (default: `--headless --disable-gpu --no-sandbox`)
+
 Further reading on [Google Lighthouse](https://github.com/GoogleChrome/lighthouse#using-programmatically)
 
 Usage : Improved

entrypoint.sh

@@ -1,9 +1,11 @@
 #!/bin/sh
 set -e
 
+CHROME_FLAGS=${CHROME_FLAGS:-"--headless --disable-gpu --no-sandbox"}
+
 # first arg is `-f` or `--some-option`
 if [ "${1#http}" != "$1" ]; then
-    set -- lighthouse --enable-error-reporting --chrome-flags="--headless --disable-gpu" "$@"
+    set -- lighthouse --enable-error-reporting --chrome-flags="${CHROME_FLAGS}" "$@"
 fi
 
 exec "$@"