Icehrm docker worker and readme

Dockerfile-worker

@@ -0,0 +1,32 @@
+FROM alpine:3.11
+LABEL Maintainer="Thilina, Pituwala <thilina@icehrm.com>" \
+      Description="IceHrm Docker Container with Nginx 1.16 & PHP-FPM 7.3 based on Alpine Linux."
+
+ARG EXE_ENV
+
+RUN apk upgrade --available
+
+RUN apk add --no-cache tini openrc busybox-initscripts
+
+
+# Install packages
+RUN apk --no-cache add php7 php7-opcache php7-mysqli php7-json php7-openssl php7-curl \
+    php7-zlib php7-xml php7-phar php7-intl php7-dom php7-xmlreader php7-ctype php7-session \
+    php7-mbstring php7-gd curl
+
+# Setup document root
+RUN mkdir -p /var/www/html
+
+# Add application
+WORKDIR /var/www/html
+COPY ./app /var/www/html/app/
+COPY ./core /var/www/html/core/
+COPY ./web /var/www/html/web/
+COPY ./index.php /var/www/html/index.php
+COPY ./docker/$EXE_ENV/config/config.php /var/www/html/app/config.php
+
+
+COPY ./docker/worker/config/ice-cron /etc/crontabs/root
+RUN rm /var/www/html/app/data/icehrm.log
+
+CMD /usr/sbin/crond -f -l 8