test: start work on Pale Moon tests

Signed-off-by: Xe Iaso <me@xeiaso.net>

test/palemoon/Dockerfile

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+FROM golang:alpine AS build
+
+RUN go install github.com/mattn/goreman@latest
+
+FROM debian:latest AS run
+RUN apt-get update -y && \
+  apt-get install -y tigervnc-standalone-server dwm xterm && \
+  rm -rf /var/lib/apt/lists
+ENV VNC_DESKTOP_NAME="Xtigervnc"
+ENV VNC_GEOMETRY=1280x800
+COPY app/ /app/
+COPY --from=build /go/bin/goreman /usr/bin/goreman
+
+CMD ["/app/main.sh"]

test/palemoon/Dockerfile.palemoon

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+FROM debian:latest
+
+RUN apt-get update \
+  && apt-get -y install ca-certificates
+COPY palemoon.list /etc/apt/sources.list.d/palemoon.list
+COPY veit@kannegieser.net.gpg /usr/share/keyrings/veit@kannegieser.net.gpg
+RUN apt-get update \
+  && apt-get install -y palemoon veit-kannegieser-archive-keyring

test/palemoon/README.md

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+# Pale Moon CI tests
+
+Pale Moon has exposed [some pretty bad bugs](https://anubis.techaro.lol/blog/release/v1.21.1#fix-event-loop-thrashing-when-solving-a-proof-of-work-challenge) in Anubis. As such, we're running Pale Moon against Anubis in CI to ensure that it keeps working.
+
+This test is a fork of [dtinth/xtigervnc-docker](https://github.com/dtinth/xtigervnc-docker) but focused on Pale Moon.

test/palemoon/anubis/anubis.yaml

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+bots:
+  - name: palemoon
+    user_agent_regex: PaleMoon
+    action: CHALLENGE
+    challenge:
+      difficulty: 4
+      report_as: 4
+      algorithm: fast
+
+status_codes:
+  CHALLENGE: 401
+  DENY: 403

test/palemoon/app/Procfile

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+xtigervnc: ./xtigervnc.sh
+dwm: ./dwm.sh

test/palemoon/app/dwm.sh

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+#!/bin/bash
+export DISPLAY=:0
+while true; do
+    dwm
+    sleep 1
+done

test/palemoon/app/main.sh

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+#!/bin/bash -e
+cd /app
+goreman start

test/palemoon/app/xtigervnc.sh

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+#!/bin/bash -e
+exec Xtigervnc -desktop "$VNC_DESKTOP_NAME" -geometry "$VNC_GEOMETRY" -listen tcp -ac -SecurityTypes None -AlwaysShared -AcceptKeyEvents -AcceptPointerEvents -SendCutText -AcceptCutText :0

test/palemoon/docker-compose.yml

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+services:
+  display:
+    build: .
+    volumes:
+      - ./app:/app:ro
+  novnc:
+    image: geek1011/easy-novnc
+    command: -a :5800 -h display --no-url-password
+    ports:
+      - 5800:5800
+  palemoon-386:
+    hostname: i386
+    platform: linux/386
+    build:
+      dockerfile: Dockerfile.palemoon
+    command: sleep inf
+    environment:
+      DISPLAY: display:0
+  palemoon-amd64:
+    hostname: amd64
+    platform: linux/amd64
+    build:
+      dockerfile: Dockerfile.palemoon
+    command: sleep inf
+    environment:
+      DISPLAY: display:0

test/palemoon/palemoon.list

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+deb [           signed-by=/usr/share/keyrings/veit@kannegieser.net.gpg] https://kannegieser.net/palemoon mx23_gtk3 main

test/palemoon/test.sh

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+export VERSION=$GITHUB_COMMIT-test
+export KO_DOCKER_REPO=ko.local
+
+set -u
+
+(
+  cd ../.. &&
+    ko build --platform=all --base-import-paths --tags="latest" --image-user=1000 --image-annotation="" --image-label="" ./cmd/anubis -L
+)