feat: template pki/vars

instead of copying the default vars file, that is wrong for nearly everyone,
this commit adds a jinja2 template that takes data from the environment

fixes #3

Dockerfile

@@ -10,7 +10,9 @@ RUN apk add --no-cache \
       su-exec \
       bash \
       taskd \
-      taskd-pki
+      taskd-pki \
+      py2-pip \
+ && pip2 install j2cli
 
 COPY docker/root /
 

docker/root/etc/s6.d/taskd/finish

@@ -1,2 +1,2 @@
 #!/bin/bash
-s6-svc -O /etc/s6.d/taskd
+s6-svscanctl -t /etc/s6.d

docker/root/etc/s6.d/taskd/run

@@ -12,7 +12,7 @@ if [ ! -f ${TASKDDATA}/config ]; then
 
   # Copy tools for certificates generation and generate it
   cp /usr/share/taskd/pki/generate* ${TASKDDATA}/pki
-  cp /usr/share/taskd/pki/vars ${TASKDDATA}/pki
+  j2 /usr/share/taskd/vars.j2 > ${TASKDDATA}/pki/vars
   cd ${TASKDDATA}/pki
   ./generate
   cd /

docker/root/usr/share/taskd/vars.j2

@@ -0,0 +1,7 @@
+BITS={{ BITS | default(4096) }}
+EXPIRATION_DAYS={{ EXPIRATION_DAYS | default(3650) }}
+ORGANIZATION={{ ORGANIZATION | default("") }}
+CN={{ CN | default("localhost") }}
+COUNTRY={{ COUNTRY | default("") }}
+STATE={{ STATE | default("") }}
+LOCALITY={{ LOCALITY | default("") }}