feat(docker): update base image and deps

Dockerfile

@@ -1,18 +1,18 @@
-FROM ubuntu:16.04 as builder
+FROM ubuntu:18.04 as builder
 
-ENV LIBVIPS_VERSION 8.6.2
-ENV DEP_VERSION v0.4.1
+ENV LIBVIPS_VERSION 8.7.3
+ENV DEP_VERSION v0.5.0
 ENV GOLANG_VERSION 1.11
 
 # Installs libvips + required libraries
 RUN \
     apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y \
     automake build-essential curl \
-    gobject-introspection gtk-doc-tools libglib2.0-dev libjpeg-turbo8-dev libpng12-dev \
+    gobject-introspection gtk-doc-tools libglib2.0-dev libjpeg-turbo8-dev libpng-dev \
     libwebp-dev libtiff5-dev libgif-dev libexif-dev libxml2-dev libpoppler-glib-dev \
     swig libmagickwand-dev libpango1.0-dev libmatio-dev libopenslide-dev libcfitsio-dev \
-    libgsf-1-dev fftw3-dev liborc-0.4-dev librsvg2-dev && \
+    libgsf-1-dev fftw3-dev liborc-0.4-dev librsvg2-dev swig libbrotli-dev && \
     cd /tmp && \
     curl -OL https://github.com/libvips/libvips/releases/download/v${LIBVIPS_VERSION}/vips-${LIBVIPS_VERSION}.tar.gz && \
     tar zvxf vips-${LIBVIPS_VERSION}.tar.gz && \
@@ -50,21 +50,23 @@ ADD . /go/src/github.com/aldor007/mort
 RUN cd /go/src/github.com/aldor007/mort &&  dep ensure -vendor-only
 RUN cd /go/src/github.com/aldor007/mort; go build -o /go/mort cmd/mort/mort.go;
 
-FROM ubuntu:16.04
+FROM ubuntu:18.04
 
 RUN \
     # Install runtime dependencies
     apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends -y \
-    libglib2.0-0 libjpeg-turbo8 libpng12-0 libopenexr22 \
-    libwebp5 libtiff5 libgif7 libexif12 libxml2 libpoppler-glib8 \
-    libmagickwand-6.q16-2 libpango1.0-0 libmatio2 libopenslide0 \
-    libgsf-1-114 fftw3 liborc-0.4 librsvg2-2 libcfitsio2 && \
+    libglib2.0-0 libjpeg-turbo8 libpng16-16 libopenexr22 \
+    libwebp6 libtiff5 libgif7 libexif12 libxml2 libpoppler-glib8 \
+    libmagickwand-6.q16hdri-3 libmagickcore-6.q16-3-extra  libmagickcore-6.q16hdri-3 \
+    libpango1.0-0 libmatio4 libopenslide0 libwebpmux3 \
+    libgsf-1-114 fftw3  liborc-0.4 librsvg2-2 libcfitsio-bin libbrotli1 && \
     apt-get install -y ca-certificates && \
     # Clean up
     apt-get autoremove -y && \
     apt-get autoclean && \
     apt-get clean && \
+    ldconfig /usr/local/lib && \
     rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 RUN mkdir -p /etc/mort/