Upgrade to Ubuntu 19.10

Dockerfile

@@ -2,24 +2,26 @@
 #RUN apk add --no-cache \
 # -X http://dl-cdn.alpinelinux.org/alpine/edge/testing \
 # tesseract-ocr-dev make g++ poco-dev python3
-FROM ubuntu:18.04 as builder
+FROM ubuntu:19.10 as builder
 RUN apt-get update && apt-get install -y libtesseract-dev make g++ libpoco-dev python3
 RUN mkdir /app
 WORKDIR /app
 COPY . /app
-RUN make -j4
+RUN make clean && make -j4
 
 #FROM alpine:3.10.1
 #RUN apk add --no-cache \
 # -X http://dl-cdn.alpinelinux.org/alpine/edge/testing \
 # tesseract-ocr poco
-FROM ubuntu:18.04
+FROM ubuntu:19.10
 RUN apt-get update && \
  apt-get install -y \
  libtesseract4 \
- libpocojson50 \
- libpoconet50 \
- libpocoutil50
+ libpocojson62 \
+ libpoconet62 \
+ libpocoutil62 && \
+ apt-get clean && \
+ rm -fr /var/lib/apt/lists/* /tmp/* /var/tmp/*
 WORKDIR /app
 COPY tesseract tesseract
 COPY --from=builder /app/server server