Added setcap command.

entrypoint

@@ -13,6 +13,7 @@ export HOME=/var/lib/proton
 # The ProtonMail Bridge expects connections from 127.0.0.1. Use socat to
 # redirect incoming connections to localhost. Also, this allows us to use
 # the default SMTP/IMAP ports.
+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 &
 

initproton

@@ -2,6 +2,7 @@
 set -eufo pipefail
 
 BRIDGE=/bin/protonmail-bridge
+FIFO=/tmp/fifo
 PRINT_INFO=${PRINT_INFO:-""}
 
 #### INIT
@@ -31,6 +32,7 @@ if [ -n "$PRINT_INFO" ]; then
 fi
 
 # Fake a terminal, so it does not quit because of EOF...
-rm -f faketty
-mkfifo faketty
-cat faketty | $BRIDGE --cli
+if [ ! -e "$FIFO" ]; then
+  mkfifo $FIFO
+fi
+cat $FIFO | $BRIDGE --cli