add files

README.md

+Store Docker files.
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tika-server/Dockerfile

+FROM alpine:3.5
+ENV TIKA_JAR="tika-server.jar" \
+    TIKA_MEMORY="1g" \
+    TIKA_VERSION="1.16"
+LABEL description="Apache Tika Server" \
+    version=${TIKA_VERSION}
+WORKDIR /usr/share/tika/
+RUN apk add --no-cache openjdk8-jre
+RUN apk add --no-cache wget
+RUN wget https://www.apache.org/dist/tika/tika-server-${TIKA_VERSION}.jar -O /usr/share/tika/${TIKA_JAR}
+EXPOSE 9998
+ENTRYPOINT java -Xmx${TIKA_MEMORY} -jar /usr/share/tika/${TIKA_JAR} -h 0.0.0.0
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