Added docker files.

Dockerfile

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+FROM debian:wheezy-slim
+
+RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 8756C4F765C9AC3CB6B85D62379CE192D401AB61 && \
+    echo deb http://deb.seadrive.org wheezy main | tee /etc/apt/sources.list.d/seafile.list && \
+    apt-get update -y && \
+    apt-get install -y seafile-cli procps curl && \
+    rm -rf /var/lib/apt/lists/*
+
+WORKDIR /seafile-client
+
+COPY start.sh /seafile-client/start.sh
+
+RUN chmod +x /seafile-client/start.sh && \
+    useradd -U -d /seafile-client -s /bin/bash seafile && \
+    usermod -G users seafile && \
+    chown seafile:seafile -R /seafile-client && \
+    su - seafile -c "seaf-cli init -d /seafile-client"
+
+CMD ["./start.sh"]