diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..a9d5f7e
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,22 @@
+.git
+.gitignore
+docker-compose.yml
+docker-compose.*.yml
+.editorconfig
+.env.example
+.env.testing
+phpunit.xml
+phpunit.xml.dist
+tests/
+node_modules/
+npm-debug.log
+yarn-error.log
+.DS_Store
+Thumbs.db
+*.md
+!composer.json
+!composer.lock
+README.md
+CHANGELOG.md
+CONTRIBUTING.md
+graphify-out/
diff --git a/Dockerfile b/Dockerfile
index b868eeb..908a557 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@ ENV APACHE_DOCUMENT_ROOT=/var/www/html
 ENV COMPOSER_ALLOW_SUPERUSER=1
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
-    libpng-dev libjpeg-dev libfreetype6-dev libzip-dev libsqlite3-dev \
+    libpng-dev libjpeg-dev libfreetype6-dev libzip-dev libsqlite3-dev libonig-dev \
     unzip git curl && \
     docker-php-ext-configure gd --with-freetype --with-jpeg && \
     docker-php-ext-install gd zip pdo_sqlite pdo_mysql mbstring exif opcache && \