Fixed Dockerfile

.docker/Dockerfile

@@ -1,12 +0,0 @@
-FROM php:7.4-apache
-
-# Set working directy at web server root
-WORKDIR /var/www/html
-
-# Manually installs Lockbox
-COPY ../lockbox/* /
-COPY ../config/env.example.php ./php/env.php
-COPY ../config/key.public .
-
-RUN mkdir /var/www/data
-RUN chmod 666 /var/www/data

Dockerfile

@@ -0,0 +1,13 @@
+FROM php:7.4-apache
+
+# Set working directy at web server root
+WORKDIR /var/www/html
+
+# Manually installs Lockbox
+COPY ./lockbox/ .
+COPY ./config/env.example.php ./php/env.php
+COPY ./config/key.public .
+
+# Create directory to save submissions and adjust permissions
+RUN mkdir /var/www/data
+RUN chown -R www-data:www-data /var/www/data