Create Dockerfile for Billing (#2477)

* build script for billing

* Add entrypoint script

* Add dockerfile and docker ignore

src/Billing/entrypoint.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+# Setup
+
+GROUPNAME="bitwarden"
+USERNAME="bitwarden"
+
+LUID=${LOCAL_UID:-0}
+LGID=${LOCAL_GID:-0}
+
+# Step down from host root to well-known nobody/nogroup user
+
+if [ $LUID -eq 0 ]
+then
+    LUID=65534
+fi
+if [ $LGID -eq 0 ]
+then
+    LGID=65534
+fi
+
+# Create user and group
+
+groupadd -o -g $LGID $GROUPNAME >/dev/null 2>&1 ||
+groupmod -o -g $LGID $GROUPNAME >/dev/null 2>&1
+useradd -o -u $LUID -g $GROUPNAME -s /bin/false $USERNAME >/dev/null 2>&1 ||
+usermod -o -u $LUID -g $GROUPNAME -s /bin/false $USERNAME >/dev/null 2>&1
+mkhomedir_helper $USERNAME
+
+# The rest...
+
+chown -R $USERNAME:$GROUPNAME /app
+mkdir -p /etc/bitwarden/core
+mkdir -p /etc/bitwarden/logs
+mkdir -p /etc/bitwarden/ca-certificates
+chown -R $USERNAME:$GROUPNAME /etc/bitwarden
+
+cp /etc/bitwarden/ca-certificates/*.crt /usr/local/share/ca-certificates/ >/dev/null 2>&1 \
+    && update-ca-certificates
+
+exec gosu $USERNAME:$GROUPNAME dotnet /app/Billing.dll