Dockerfile

@@ -1,27 +1,22 @@
 # Build the ProtonMail Bridge.
-FROM golang:1.18-buster as build
+FROM golang:1.15-alpine as build
 ENV LANG C.UTF-8
-
-# Install required build packages
-RUN apt-get update \
- && apt-get install -y \
-      bash \
-      build-essential \
+RUN apk add --no-cache \
       curl \
+      gcc \
       git \
-      libsecret-1-dev \
+      libsecret-dev \
+      make \
       musl-dev
-
-# Download/build the application
 WORKDIR /usr/src
+
 ARG RELEASE
 ARG TAG
 RUN if [ -n "$RELEASE" ]; then \
          echo "Using release $RELEASE..." \
       && curl -L -s "https://github.com/ProtonMail/proton-bridge/archive/$RELEASE.tar.gz" | tar zx \
-	  && export PROTON_BRIDGE="proton-bridge-$(echo $RELEASE | sed -e 's/^\(v\|br\)//')" \
-	  && ln -s "${PROTON_BRIDGE}" proton-bridge \
-      && cd "${PROTON_BRIDGE}" \
+      && ln -s "proton-bridge-$RELEASE" proton-bridge \
+      && cd proton-bridge \
   ; else \
          git clone https://github.com/ProtonMail/proton-bridge.git proton-bridge \
       && cd proton-bridge \
@@ -30,26 +25,21 @@ RUN if [ -n "$RELEASE" ]; then \
  && make build-nogui
 
 # Create a container for the ProtonMail Bridge.
-FROM debian:stable
+FROM alpine:edge
 ENV LANG C.UTF-8
 
 EXPOSE 25/tcp
 EXPOSE 143/tcp
 
 COPY --from=build /usr/src/proton-bridge/proton-bridge /bin/proton-bridge
-COPY --from=build /usr/src/proton-bridge/bridge /bin/bridge
 COPY entrypoint /bin/
 COPY initproton /bin/
-RUN apt-get update\
- && apt-get install -y --no-install-recommends --no-install-suggests\
-      libcap2\
-      libsecret-1-0\
-      gosu\
-      gpg-agent\
-      pass\
-      socat\
- && rm -rf /var/lib/apt/lists/*\
- && chmod +x /bin/entrypoint\
+RUN apk add --no-cache \
+      libsecret \
+      pass \
+      socat \
+      su-exec \
+ && chmod +x /bin/entrypoint \
  && chmod +x /bin/initproton
 
 WORKDIR /var/lib/proton

entrypoint

@@ -9,11 +9,13 @@ GROUP=proton
 if getent group $GROUP_ID > /dev/null; then
   echo "Using group $GROUP with GID $GROUP_ID..."
   GROUP=$(getent group $GROUP_ID | cut -d: -f1)
+  echo "Using group $GROUP with GID $GROUP_ID..."
 else
   echo "Adding group $GROUP with GID $GROUP_ID..."
   addgroup -g $GROUP_ID $GROUP
 fi
-echo "Adding user proton ($USER_ID) with group $GROUP ${GROUP_ID}..."
+echo "Adding user proton with group $GROUP..."
+echo adduser -D -u $USER_ID -G $GROUP -h /var/lib/proton -s /bin/sh proton
 adduser -D -u $USER_ID -G $GROUP -h /var/lib/proton -s /bin/sh proton
 chown -R ${USER_ID}:${GROUP_ID} /var/lib/proton
 export HOME=/var/lib/proton
@@ -25,5 +27,4 @@ setcap 'cap_net_bind_service=+ep' /usr/bin/socat
 socat TCP-LISTEN:25,fork TCP:127.0.0.1:1025 &
 socat TCP-LISTEN:143,fork TCP:127.0.0.1:1143 &
 
-echo "Starting ProtonMail Bridge..."
-exec /usr/sbin/gosu proton "$@"
+exec /sbin/su-exec proton "$@"

initproton

@@ -1,7 +1,7 @@
-#!/bin/bash
+#!/bin/bash                                                                     
 set -eufo pipefail
 
-BRIDGE=/bin/bridge
+BRIDGE=/bin/proton-bridge
 FIFO=/tmp/fifo
 PRINT_INFO=${PRINT_INFO:-""}
 
@@ -11,20 +11,14 @@ if [ -n "$PASS_FILE" ]; then
     PASS=$(cat $PASS_FILE)
 fi
 
-echo "Checking for GPG configuration..."
 if ! [ -d .gnupg ]; then
-  echo "Generating GPG Key..."
   echo -e "%no-protection\nKey-Type: RSA\nKey-Length: 4096\nName-Real: $EMAIL\nExpire-Date: 0\n%commit" \
     | gpg --generate-key --batch
 fi
-echo "Checking for Password Store..."
 if ! [ -d .password-store ]; then
-  echo "Initializing Pass..."
   pass init "$EMAIL"
 fi
-echo "Checking for ProtonMail Bridge Cache..."
 if ! [ -d ~/.cache/protonmail/bridge ]; then
-  echo "Logging in to ProtonMail Bridge..."
   COMMAND="login\n$EMAIL\n$PASSWORD"
   MFA_CODE=${MFA_CODE:-}
   if [ -n "$MFA_CODE" ]; then
@@ -34,7 +28,6 @@ if ! [ -d ~/.cache/protonmail/bridge ]; then
 fi
 
 if [ -n "$PRINT_INFO" ]; then
-  echo "Printing Info..."
   echo info | $BRIDGE --cli | egrep '(Username|Password)' | sort -ru
 fi
 
@@ -44,6 +37,4 @@ if [ -n "$LOG_LEVEL" ]; then
   ARGUMENTS="${ARGUMENTS} --log-level ${LOG_LEVEL}"
 fi
 
-echo "Starting ProtonMail Bridge: $BRIDGE $ARGUMENTS"
-$BRIDGE --version
 $BRIDGE $ARGUMENTS