Port Fedora and CentOS builds and remove web build

Simplifies a number of aspects of the RPM build, including moving
.copr/Makefile into the "fedora/" folder (and leaving a symlink),
removing the jellyfin-web build components, and renaming it
jellyfin-server like Debian did.

deployment/Dockerfile.centos.amd64

@@ -0,0 +1,32 @@
+FROM centos:7
+# Docker build arguments
+ARG SOURCE_DIR=/jellyfin
+ARG ARTIFACT_DIR=/dist
+ARG SDK_VERSION=3.1
+# Docker run environment
+ENV SOURCE_DIR=/jellyfin
+ENV ARTIFACT_DIR=/dist
+ENV IS_DOCKER=YES
+
+# Prepare CentOS environment
+RUN yum update -y \
+ && yum install -y epel-release \
+ && yum install -y @buildsys-build rpmdevtools yum-plugins-core libcurl-devel fontconfig-devel freetype-devel openssl-devel glibc-devel libicu-devel git
+
+# Install DotNET SDK
+RUN rpm -Uvh https://packages.microsoft.com/config/rhel/7/packages-microsoft-prod.rpm \
+ && rpmdev-setuptree \
+ && yum install -y dotnet-sdk-${SDK_VERSION}
+
+# Create symlinks and directories
+RUN ln -sf ${SOURCE_DIR}/deployment/build.centos.amd64 /build.sh \
+ && mkdir -p ${SOURCE_DIR}/SPECS \
+ && ln -s ${SOURCE_DIR}/fedora/jellyfin.spec ${SOURCE_DIR}/SPECS/jellyfin.spec \
+ && mkdir -p ${SOURCE_DIR}/SOURCES \
+ && ln -s ${SOURCE_DIR}/fedora ${SOURCE_DIR}/SOURCES
+
+VOLUME ${SOURCE_DIR}/
+
+VOLUME ${ARTIFACT_DIR}/
+
+ENTRYPOINT ["/build.sh"]