Add php postgres package (#12)

Author: p4block

Dockerfile

@@ -20,6 +20,7 @@ RUN \
     apt-get install -y \
     nginx-light \
     php7.3-mysql \
+    php7.3-pgsql \
     php7.3-imagick \
     php7.3-mbstring \
     php7.3-json \
@@ -55,4 +56,4 @@ RUN chmod +x /entrypoint.sh && \
 
 ENTRYPOINT [ "/entrypoint.sh" ]
 
-CMD [ "nginx" ]
+CMD [ "nginx" ]