disable read-only mode

Dockerfile

@@ -3,6 +3,7 @@ FROM alpine:${ALPINE_VERSION}
 
 ENV FTP_USER=user
 ENV FTP_PASS=password
+ENV FTP_WRITE_ENABLE=NO
 
 RUN set -eux; \
     apk update; \

README.md

@@ -13,6 +13,8 @@ credentials:
 
 * `FTP_USER`: username for the FTP account (default: `user`)
 * `FTP_PASS`: password for the FTP account (default: `password`)
+* `FTP_WRITE_ENABLE`: set to `NO` (default) to make the FTP read only, set to
+  `YES` to enable write permissions
 
 ## Ports and volumes
 

run-vsftpd.sh

@@ -6,4 +6,4 @@ echo "$FTP_USER:$FTP_PASS" | chpasswd >& /dev/null
 
 touch /var/log/vsftpd.log
 tail -f /var/log/vsftpd.log >> /dev/stdout &
-vsftpd /etc/vsftpd/vsftpd.conf
+vsftpd -owrite_enable=${FTP_WRITE_ENABLE} /etc/vsftpd/vsftpd.conf

vsftpd.conf

@@ -13,7 +13,7 @@ allow_writeable_chroot=YES
 passwd_chroot_enable=YES
 
 # read only mode
-write_enable=NO
+# write_enable=NO
 
 # message
 dirmessage_enable=YES