Fully working catbox-ircd stack

.env.example

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+# Global Settings
+LOCAL_STACK_DIR=/srv/docker/volumes/ircd
+
+# Catbox (optional)
+CTB_CONTAINER_NAME=
+CTB_RESTART=
+
+CTB_BLD_REPO=
+CTB_BLD_VER=

.gitignore

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+*.env

catbox/Dockerfile

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+FROM golang:alpine AS build
+
+ARG BLD_REPO=${BLD_REPO:-https://github.com/horgh/catbox.git}
+ARG BLD_VER=${BLD_VER:-master}
+
+ARG GOOS
+ARG GOARCH
+
+RUN apk --update add \
+        git
+
+RUN git clone \
+        --depth 1 \
+        --single-branch \
+        --branch ${BLD_VER} \
+        ${BLD_REPO} \
+        /srv/src/catbox
+
+WORKDIR /srv/src/catbox
+
+RUN GOOS=${GOOS} \
+    GOARCH=${GOARCH} \
+    CGO_ENABLED=0 \
+        go build \
+            --installsuffix cgo \
+            --ldflags "-w -s" \
+            -o "/srv/dist/catbox" \
+            .
+
+RUN cp -r /srv/src/catbox/conf /srv/dist/conf && \
+    sed -i 's|#opers-config =|opers-config = /srv/data/conf/opers.conf|g' /srv/dist/conf/catbox.conf && \
+    sed -i 's|#servers-config =|servers-config = /srv/data/conf/servers.conf|g' /srv/dist/conf/catbox.conf && \
+    sed -i 's|#users-config =|users-config = /srv/data/conf/users.conf|g' /srv/dist/conf/catbox.conf
+
+FROM alpine:latest
+
+RUN adduser -D catbox
+
+COPY --from=build --chown=catbox /srv/dist /srv/catbox
+
+COPY root/ /
+
+ENTRYPOINT ["/entrypoint.sh"]

catbox/root/entrypoint.sh

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+#!/bin/sh
+
+mkdir -p /srv/data
+
+cp --no-clobber -p -r /srv/catbox/conf /srv/data/
+
+su catbox \
+    -c "/srv/catbox/catbox \
+            -conf /srv/data/conf/catbox.conf"

docker-compose.yml

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+version: "3"
+
+services:
+  catbox:
+    build:
+      context: catbox/
+      args:
+        - BLD_REPO=${CTB_BLD_REPO:-https://github.com/horgh/catbox.git}
+        - BLD_VER=${CTB_BLD_VER:-master}
+    container_name: ${CTB_CONTAINER_NAME:-ircd-catbox}
+    restart: ${CTB_RESTART:-unless-stopped}
+    volumes:
+      - ${LOCAL_STACK_DIR:-/srv/docker/volumes/ircd}/catbox/data:/srv/data
+    ports:
+      - 6667:6667